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xfs_mac.h
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xfs_mac.h
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/*
* Copyright (c) 2001-2002,2005 Silicon Graphics, Inc.
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __XFS_MAC_H__
#define __XFS_MAC_H__
/*
* Mandatory Access Control
*
* Layout of a composite MAC label:
* ml_list contains the list of categories (MSEN) followed by the list of
* divisions (MINT). This is actually a header for the data structure which
* will have an ml_list with more than one element.
*
* -------------------------------
* | ml_msen_type | ml_mint_type |
* -------------------------------
* | ml_level | ml_grade |
* -------------------------------
* | ml_catcount |
* -------------------------------
* | ml_divcount |
* -------------------------------
* | category 1 |
* | . . . |
* | category N | (where N = ml_catcount)
* -------------------------------
* | division 1 |
* | . . . |
* | division M | (where M = ml_divcount)
* -------------------------------
*/
#define XFS_MAC_MAX_SETS 250
typedef struct xfs_mac_label {
__uint8_t ml_msen_type; /* MSEN label type */
__uint8_t ml_mint_type; /* MINT label type */
__uint8_t ml_level; /* Hierarchical level */
__uint8_t ml_grade; /* Hierarchical grade */
__uint16_t ml_catcount; /* Category count */
__uint16_t ml_divcount; /* Division count */
/* Category set, then Division set */
__uint16_t ml_list[XFS_MAC_MAX_SETS];
} xfs_mac_label_t;
/* MSEN label type names. Choose an upper case ASCII character. */
#define XFS_MSEN_ADMIN_LABEL 'A' /* Admin: low<admin != tcsec<high */
#define XFS_MSEN_EQUAL_LABEL 'E' /* Wildcard - always equal */
#define XFS_MSEN_HIGH_LABEL 'H' /* System High - always dominates */
#define XFS_MSEN_MLD_HIGH_LABEL 'I' /* System High, multi-level dir */
#define XFS_MSEN_LOW_LABEL 'L' /* System Low - always dominated */
#define XFS_MSEN_MLD_LABEL 'M' /* TCSEC label on a multi-level dir */
#define XFS_MSEN_MLD_LOW_LABEL 'N' /* System Low, multi-level dir */
#define XFS_MSEN_TCSEC_LABEL 'T' /* TCSEC label */
#define XFS_MSEN_UNKNOWN_LABEL 'U' /* unknown label */
/* MINT label type names. Choose a lower case ASCII character. */
#define XFS_MINT_BIBA_LABEL 'b' /* Dual of a TCSEC label */
#define XFS_MINT_EQUAL_LABEL 'e' /* Wildcard - always equal */
#define XFS_MINT_HIGH_LABEL 'h' /* High Grade - always dominates */
#define XFS_MINT_LOW_LABEL 'l' /* Low Grade - always dominated */
/* On-disk XFS extended attribute names */
#define SGI_MAC_FILE "SGI_MAC_FILE"
#define SGI_MAC_FILE_SIZE (sizeof(SGI_MAC_FILE)-1)
#ifdef __KERNEL__
#ifdef CONFIG_FS_POSIX_MAC
/* NOT YET IMPLEMENTED */
#define MACEXEC 00100
#define MACWRITE 00200
#define MACREAD 00400
struct xfs_inode;
extern int xfs_mac_iaccess(struct xfs_inode *, mode_t, cred_t *);
#define _MAC_XFS_IACCESS(i,m,c) (xfs_mac_iaccess(i,m,c))
#define _MAC_VACCESS(v,c,m) (xfs_mac_vaccess(v,c,m))
#define _MAC_EXISTS xfs_mac_vhaslabel
#else
#define _MAC_XFS_IACCESS(i,m,c) (0)
#define _MAC_VACCESS(v,c,m) (0)
#define _MAC_EXISTS (NULL)
#endif
#endif /* __KERNEL__ */
#endif /* __XFS_MAC_H__ */